It also depends on what type of adapters your other equipment has. If you have old G stuff then you most likely will get little benefit to replacing the router.
I would spend $50-$75 on a midgrade dual band router. The I would use your old router as a AP and run the G stuff on that one. You could spend the extra between the $75 and $100 getting adapters for the other machines if needed.
I normally stay away with particular recommendation because the vendors change things so that a good router today could be crap tomorrow. The router I like today in your price range is the ASUS RT-53. It has pretty advanced software and if you don't like it you can load dd-wrt on it. Be careful look for routers that say 300-300 or 150-150. This means it has 2 radios. may not matter though if you do not plan to use 5g band.