Tascam do a few little handheld recorders you can plug mic's into, and also usually have mic's built in which are reasonable quality. anything around the 100-150£ mark will have pretty much the same quality, Tascam is a good bet; ensure its 24bit 96khz or higher to get the best out of your recordings (last thing you want to be doing is dithering and redithering your samples as this adds noise)