Bite the bullet and get a 75. You'll be much happier in the long run, and it gives you a much wider range of stocking options than a 29. I was confined to smaller tanks for years before I moved out on my own, and was able to set up a 55. Cichlids in particular are tougher to keep in smaller tanks, and there's something more satisfying about them than I find with fish that are more suitable for smaller tanks. Now I have 2 75's, 2 55's, a 38, a 30 long, 2 29's, and a 10 running. Soon to be settting up a 40, just waiting on a heater.