Jon
If you want affordable workhorses that will last a lifetime, you can't really go wrong with a Speedia, however the wide drum versions tend to command quite a high price these days (in fact I've noticed that the narrow drum Speedias are creeping up as well).
Still affordable (as long as you're not too worried about mint condition) are the also ever reliable Young's Rapidex (my favourite of the classics) and Trudex. The Avon Royal Supreme is also a good classic, and you can usually get a very decent condition one for a bargain. Occasionally an older Purist model pops up on eBay for a sensible price as well.
I'll also echo Mike's Merlin recs, although be aware they're on the heavier side.
As for Allcocks - it's only the Match Aerial that tends to fetch high prices, most of their other reels (including the Recordbreaker) go for more sensible prices. I've only used a Match Aerial (which is an excellent reel), so I can't speak for the Recordbreaker.
You could also look at an Adcock Stanton. A bit "tinny" for my tastes, both in feel and looks, but a classic reel that goes for a sensible price.