Haven't used P3, but I understand it does not support transparency in textures. This is one very nice feature of P4, allowing a great deal of variation in clothing and props. You can have see through areas or totally hide a portion of a figure. It also does wonders for increasing the realism of hair, with several excellent free hair sets available using transparency. Don't know what the current exchange rate is but that 50 Pounds should get Victoria or Michael. one of the Millenium figures from DAZ and a nice high resolution texture. That would probably be my choice.

"Democracy is a pathetic belief in the collective wisdom of individual ignorance." - H. L. Mencken