What should I go for - advice/partners in crime needed

Ok sooo its that time of year where one's got a little money and a burning urge to spend - but what should it be?

Sigma 120-300mm f2.8 OS - nice long lens suitable for up to 600mm work. Downside is not only the chance that I have to buy blind (ie no testing in a shop) , but also that its kinda going to ruin me for a few months.

Cognisys goodies - http://www.cognisys-inc.com …d7523bb31c6aa57​0e885287aa That pretty auto rails or maybe lasers and stuff. Downside is I'm already fairly heavily invested in macro and I don't do enough tripod based shooting as it is. Probably should get a better set of legs before this...

Flash goodies -http://www.lencarta.co​m …-on-portable-flash-system shiny things for blinding things - downside is whilst I've got some idea I've no honest clue how I'd be using this gear (esp since I won't have any budget for modifiers or stuff for a while.

Computer - could do with an upgrade and a general boost to performance plus more harddisk space.

Stuff - like a ballhead for the tripod, new harddisk, http://www.thevestguy.​com/product.asp?id=102​86 and other thingies

So yeah I need ideas and opinions people - also boosted justifications for expensive lenses would help

I told you already. lol

Yeah but a purchase like this needs multiple supporting validations from strangers

Why not a trip somewhere exotic? Buy some good memories instead of more "stuff".

Buy a diamond ring and give it to someone. Oh, wait, sorry, that's how to burn money, as in make it go away for all time.

A trip could be very cool.