Michael,
There is little to chose between most of todays modern centre pin reels for most situations, although the prices to vary a great deal.
Before you spend a lot of money do have a look around for second hand models, and like Richard says, a lot of Trudex, Rapidex and Aerials are in use these days.
You can buy a decent second hand model for less than 100 pounds or order a Witcher Aerial for 500 pounds and wait about 6 months to get it. Purists can be obtained from anything between the RRP of 250 down to 180 in some shops.
(one day a Witcher will grace my tackle box
Something else worth thinking about is to try to get the best possible balance between rod and reel, and this might mean incorporating a small weight in the butt of your rod.
For trotting you will be holding the rod for long periods at a time and an unbalanced set-up can make this really tiring. I would suggest that you take the rod that you intend to use and test it out at the shop with the reel of your choice.
The other alternative for fishing the far bank, and my preferrence over a fixed spool reel, is a closed face reel as line feed and control is lot easier and there is no bail arm to constantly open and close. Look at the abu 1044 (if it is still made) and the really good Diawa 125M's. If you can get one then the old Abu 500 series reels are an excellent alternative.
Hope this helps.