I love the minis that WotC made and most paint up pretty well if you don't mind the softer bendy plastic, but I found the WotC rules were WAY too shallow for my taste so I use Infinity rules with Star Wars figs. Painted up a Rebel and an Imperial force using the WotC figs and used them for counts-as Ariadna and Pan-Oceana units (AT-STs make absolutely perfect Armored Cavalry-JOTUMS analogues). I prefer real terrain, but we found that the printed maps work pretty darn well with Infinity if you just ignore the squares. Infinity is VERY reliant on having lots of LOS-blocking terrain and a heavy amount of cover which was exactly what the Star Wars maps were designed for. All the rules for Infinity are free as well and they even have an online army builder that prints out a cheat sheet for your army.
Alternately, you can find the WEG rules fairly cheap on Ebay. They were really good when they came out, but they are very dated by todays standards (it is not a fast game by any means). Also, you're limited to original trilogy or doing a lot of conversion work and some of the models from that game are hard to find and were never remade by WotC, or were rare figures that will cost you a lot.
