Digital Designer, tackling RF preamp

Hi All,

I'm quite new to RF design, however I have done lots of high speed digital design. I'm looking at making an RF preamp, or rather a series of them. The goal would be to have preamps connected to multiple over-the-air antennae, then use post-amp filters to filter only the channels available from each antenna, then join all outputs together such that all channels would be on one cable. This used to be how cable worked in the old days, or how MATV systems in apartment building work.

Assumptions/Design intents
preamp:
-looking at using an ephemt FET as the active device.
-I would do a minimum of filtering before the FET. Mainly remove the FM band and block anything above the max channel I'm looking to receive.
- 75ohm inputs/outputs
post-amp filters:
-looking at making active filters based on current-feedback op amps
-preamp filters would be coarse filters using passive components. post amp filters would be more aggresive, active filters

Questions:
-My experience with filters is what I did in university. Are there any good design tools for designing filters (maybe a 3rd order chebyshev..) using current-feedback opamps? I know I could just start with spice, but for a beginner at this, I'm likely to have a garbage-in, garbage out scenario. I would much rather have a more limited tool with a few knobs that I can tweak to start to understand the circuit more.
-Assuming I can make all the required filters, and any overlapping frequencies have been filtered out, what is the correct way to join these signals together into one link?

I'm sure there are more questions, but I will only discover them as I dive further into this.

Thanks, Ivan