Hi,
Try a NAD amp- the c320 for starters, but a c350 would be best. 320s usually fetch 60-70 quid on the 'bay, 350 goes for about £100. The c350 is a stunning amp which retailed for £350- and was worth every penny of it. It is capable of withstanding future speaker upgrades too, it will just get better and better.
As for a CD player, I would think something like a Marantz CD6000 (preferably OSE or KI if you can find/afford...) if you listen to rock, pop, electronica etc, or if you prefer more smoothness, the Technics SL-PG670D or the 770D go for stupidly low prices- often £30-50. I have owned the 670, and I have to say it was a total joy- big, bold and very enjoyable to listen to (although not the best with the heavy stuff), built very well, and very slick- smooth drawer and fast, silent loading.
With any remaining budget, get some decent cables and stands if you don't already have them. Check this very website for some ideas!