To be fair dude, you missed a cracker there. The Frontier is IMHO the best performing cooker in the Pro Q lineup. Unfortunately it went pretty quickly for £50 which was a bargain considering the condition of it.
I've not used the Brinkman but I know there's at least one person on here has owned one. My concern with it is that I think it's an open bottom design which makes it much less controllable. I'm sure you can cook some good food on one.
I would suggest that if budget is an issue, build a UDS, this can be done for well under £100 and you can cook some amazing BBQ on one.
I would say that when you buy a BBQ, you do tend to get what you pay for, I've had Pro Q's which are good cookers (probably best bang for buck you can get) but recently I bought some WSM's which are more expensive, but man they cook soooooo much better, I know have to deal with spikes after 8 hours rather than drops
