I realize this is an older thread but thought I'd chime in.
We looked at several providers for our restaurant and in the end selected Point Of Success for our POS system. With start up money tight being pretty selective on where we did spend was important. P.O.S. allowed us to build our own 4 station system, complete with printers, card reader, and all the necessary software including inventory, food cost/menu building, reservation control etc. and invest less than $2200 for everything.
We started with a used eMachine desktop to act as our 'server' and I purchased ELO touch screens and IBM workstations mostly via Ebay. Now that we've been up and running a bit when the need to swap out hardware does arise I'll simply purchase new, not that there's a ton more money but it is a lot better!
We run a full-menu from pizza and subs to pastas, chops and steaks with a full Pub menu of over 35 craft beers and local wines. It took me about 18 hours over 3 or 4 days to actually build my menu the first time. Doing any adjustments now is a matter of moments for new beers, specials or price changing.
The best part of the Point Of Success system...Jeff Ward and the folks at the home office. Passionate about their product, dedicated to making it perform in ANY situation, and understanding of what the phrase "customer service" is really about!