I have a 2009 Trek 7.3 FX. It is in great condition so I reluctant to sell it. The issue is that I have converted it to a sort of tourer (rack, full mudguards etc.) for light touring (one man tent, one tail pack and 2 rear panniers only). It is fine as it is apart from I'd like it to have disc brakes, as I would like a bit more stopping power when it is loaded up (especially in the wet) and I am concerned about rim wear. A carbon fork might be an improvement too as it will make the ride slightly less buzzy. I can get a new wheelset for about £160 (Shimano hubs + Alex rims). Spa cycles also do a good range of wheelsets for £180. It also might be wise to get a 36 hole rear and a 32 hole front (my current wheels are are the OEM Bontrager Nebula 32 hole front and back). My intention is run 700c 28-32 size tyres (most likely 32). The current levers will be fine for disc brakes it seems (obviously mechanical ones). I will need some rotors, calipers, new cables and some disc brake adapters. Will mechanical discs be a noticable improvement over v-brakes? If costs are prohibitive, maybe I could just convert the front and leave the rear as a v-brake. I might stumble across some decent wheel(s) with rotors and calipers on fleabay or similar to make it a bit more cost effective. So would do I do? Keep it as is and put up with it and replace the wheels when they are worn out, convert fully / partly to discs or sell the bike and buy something more suitable?