I disagree with Chebby on this one. Yes, over-priced racks for digital componants can be questioned (do 1's and 0's really care?), but if ever there was a need to isolate a piece of hifi equipment from either vibrations through the floor from the speakers, or footfall on wooden sprung floors, it is a TT. Plus of course better quality racks or shelves allow far easier levelling, that again is vital for TT's.
The other factor here is that cheap solid plinth TT designs such as Rega (sorry!) don't have the benefit of a sprung sub-chassis (like, for example, Thorens and Linn decks) to absorb many of the outside vibrations that are so easy to trransmit through a stylus and back out into the room. In other words unless you properly isolate your deck you risk getting a rather muddy sound.
The best solution for a Rega, particularly with wooden floors, is a wall shelf (assuming the wall is solid and not modern flimsy vibrating internal plasterboard over a wooden frame). Failing that a table that allows both levelling (adjustable spikes, like on floorstanding speakers) and a de-coupling shelf system is best. You can often get s/h bargains on ebay, and for a vinyl centered system using a solid plinth deck like a Rega it is probably the best upgrade you will ever make.