Hill Mk4 or FX 4 Stage

I am going to purchase a pump. This will be my sole air supply for the next few months. Due to costs I am no longer going to be able to afford my nitro tank. The sale of my regulated nitro gauge setup will provide most of the cost of a nice pump. Now I would appreciate input from any of y'all that are using or have used either of the above pumps. Also advice on any additional filtering methods. Thanks in advance !!