Avon rods whilst being very popular are rather too short for float fishing on the Hampshire Avon, IMHO.
I prefer to use at least 14 feet and even upto 20 feet depending on your target species. Also, a lot depends of if you will be fishing from the bank or wading.
In the "Avon" range you have just about everything from the cheaper John Wilson Rods, through the Bob James (around 250 pounds) right upto the Carbotecs that JP mentions.
If you settle on those they will set you back around 400 pounds each, plus about 32 pounds per extra tip!
Carbotec are marketing a lovely 15 to 17 foot trotting rod that is absolutely perfect. The trouble is that is retails around 600 pounds.
Also, take a good look at the Preston versions of the Carbonactive (?) range. Quite similar to the Carbotecs but a lot cheaper.
For legering/feeder then look at the Drennan range as they make some truly terrifc rods at affordable prices, and as JF rightly says there is a comnplete range of tips.
At the end of the day it is a very personal choice based on where you will fish, what your target species are and how much you can afford.
Good luck in your search though.