Help me decide between the two.

get the fx looks at the regal also 

 I would recommend the Streamline. Great reviews, good shot count, and light! Looks like a great package. 

I have the streamline in .22. A great air rifle; Accurate, great shot count, light weight, balances well, and a joy to shoot. Coupled with a quality scope and mounts, it's hard to beat for the price. Also it has adjustable power. Just my 2 cents worth.

Fx now having their own repair and distribution facility here in the States might be another concideration for you. I have not looked; who in US repairs Weihrauch?

it has a little of a bark without a silencer, but very nice. Is there really a carbine version of the 110? I only ever seen one version.

If you get wh's own silencer its going to be more quiet than the streamline. Out of the box the wh trigger might be a bit better to. 

other than that streamline ftw.

HW if you want a better quality rifle.You won't have to worry about a repair center.

I'd go with the Streamline. I've never shot the HW110, but I have the Streamline. Assuming the accuracy is comparable, the Streamline is over a pound lighter, has a better magazine, repeatable adjustable power, and cheaper. I'm not exited by the polymer action on the 110 either. The Streamline magazine won't let you cock it if you are empty, a feature I really like for hunting. The shot count for the Streamline on low power is phenomenal for plinking or target shooting in the basement.

How do you get air? If you are currently pumping, you may need to get a tank and/or a compressor. This will factor hugely on your cost. What is your current gun? What PSI does it require. I say all this because you mentioned cost restrictions. May want to look at used models. 

I know it’s not one of the two, but have you considered the Brocock Compatto Target with Regulator? Super accurate, good trigger, Huma Regulator, very hand pump friendly. AoA has on sale for $899. Just a thought. 

well dont let price be the determining factor i have not held either ,but take in as much knowledge as i can the new hw 110 is made from the same plastic as which they make glock handguns with supposelivly they have worked through there barrel issues as for the streamline havent heard much of any negatives most everyone is happy with them,,,blackpool air rifles uk does some interesting reviews on them giving the hw110 gun of the year in there opinion but also states he thinks the hw 100 is a superior model ,,,i know your down to 2 but dont forget about bsa or air arms remember its gonna be a long time till u get the next dont let anything like price, since there all a couple hundred from each other throw you off ,,get what you think you will like best if i had to pick between them i belive the streamline is regulated and hw is not

We will be interested in your candid assessment after you have made your choice and used the gun for awhile. Have you actually held and shouldered both guns? How do they fit you? All things being close, one of these must whisper love to you or it will just end up a castaway in the corner. If you don't rapidly find affection then take a breather and touch many guns till you find the one. You may have to adjust you criteria but its easier than growing to hate your choice. Surprising how much touch, feel and appearance push logical criteria aside. If it is a gun you intend to be your primary long term choice the you gotta hold it first! 

if the hw110 would come with a different stock i think i would get one. that said the power adjustment on my streamline is great.

I would certainly consider used guns. You could get one of those you have already identified and have money left over to use towards an air tank or a LOT of ammo. Alternately the money would open up tons of other equally great options and the past user may have already identified the best ammo and sorted out any out of the box little issues.