Both ideal geek comedy DVD's Soapy, I'd actually have to think about which I'd rather have

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The way I see it, he probably plays PC games, like CS and Battlefield, as he's a geek, and that's a geek thing to do. Anyhoo nobody ever buys me audio equipment, even though it's where I'm most likely to spend daft money, well as daft as my spending gets, £80 for in-ear phones is pretty daft IMO

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Anyway if it was my birthday, I'd rather have something that I just wouldn't buy for myself, unlike a keyboard and mouse - these are things that most geeks prefer to choose for themselves, even trying to outdo their friends by having the sweetest setup. If you don't care about your keyboard and mouse then you've been miss-diagnosed as a geek. As I was saying I'd much rather get something like this:
http://www.amazon.co.uk/Creative-HS-Fatal1ty-Gaming-Headset/dp/B000P5VR16/ref=sr_1_22?ie=UTF8&s=electronics&qid=1246971199&sr=1-22
Nice little gaming headset from creative - £25, and don't listen to other people telling you what he likes and doesn't like, decent headphones are always useful gifts, especially if you can use them for game comms, skype, MSN, or whatever floats his boat.
Other than that I would only suggest something daft, like a USB desktop scud launcher.