If you are planning on purchasing a cpu right now you should wait a couple of weeks.
with the new Intel parts coming out you might find things change quite a bit.

if you're not confident with fully disassembling your laptop, contact dell support & I'm sure they will happily send you the engineering service manual for your model.

generally you must fully remove the board to access the fan and heatsink as they're almost always on the underside of the laptop. at this point it should be fairly simple to clean out the fan.

next you should replace the thermal paste on the cpu's and video card. you can buy this in most electronics stores for about €15 (for a small tube.) look up on youtube how to correctly apply it if you're unsure.

sometimes laptops have thermal pads rather than paste placed on parts. if you can be sure that the heatsink will sit flush against these parts then it's a good idea to remove them and put thermal compound there instead.
(some dell laptops only have screws securing the heatsink fully over the cpu and the other parts could not be relied upon to remain flush with the heatsink minus the added thickness of the thermal pads.)

That's what I'm banking on. My video card just died, so I'm stuck playing old ps2 games for the time being.

hopefully by the end of June there will be a noticeable difference in price and I can build a monster.

When talking about PC components either is correct.
For the animal the plural is "mice."

Thanks.

great lads, any chance you could have the VoD's upload to a youtube channel?
cause twitch vods allways show up al stuttery for me.

I'v not encountered this problem yet.
my only issue with it is that its way too far back on the mouse.