The sterling is a good choice. No security pins, usually get pretty nice feedback from them. I'd look for a better price though, 7 quid is a bit much for one. That's what you'd pay in the local hardware shop, can get them for 3-4 quid on ebay. Not a lot of difference but when you start buying loads of locks it really adds up.
The drawer lock might be fun. I can't say for that one but the ones made by yale are all standard pins and nice enough to pick besides the small keyway. Grab it and see, why not.
I'd also recommend eurospec (E*S) - but NOT the MP10, laird (LSH), and ERA as good beginner cylinders. ERA euro cylinders are pinned differently though; they have 6 pins and are full of spools so unless you're feeling adventurous stick with their 5 pin rim cylinders.
When you feel like progressing to spools, iseo and zone are generally pretty forgiving. Zone can be either 5 or 6 pin, but it doesn't matter. Pinning is the same in each, all spools apart from pin 1. Iseo are all spools apart from pin 3.
If you're not sure about any other locks in particular, ask away.
