Choosing a transistor

[The Master]

Ive been looking at the datasheets again and as far as i can see the LEDs in total will use at most 200mA per color. Ive been trying to find a suitable mosfet to control them but im still having a bit of trouble. There is a category on rapid called "TO-220 Logic level power MOSFETs N-Channel". I dont want a TO220 package but i thought i would look at the datasheets anyway because they seem to be exactly what you recommended. I still cant seem to understand this gate voltage. Even the logic level one im looking at says "Gate-source voltage ±18V". There is also a "Gate Threshold Voltage" That says 2.5V. Is that what i should be looking at?

I almost got the heatsink bit. skimask confused me a bit though. I have a rough idea of how hot certain components will get with a certain load on them but usually i just put my finger on it to test. That seems to work well except for when i shorted a regulator out once... ouch :P

So, It looks like the only logic level mosfets that rapid do are in a TO220 package. I want to look through the rest of the mosfets to see if any will do the job but it looks like most of them are for audio circuits

Edit: Would the 2N7000 N CHANNEL MOSFET be suitable?