What is the best figure a space marine player can get?

Answer 1

It depends, really, but you can't go wrong with a Space Marine Capter Master. Space Marines are very balanced, even their "strongest" models are balanced. An ork deff dread, for example, is very different to a Space Marine Dreadnought. Mainly because they are average at everything and ork characters are generally more close-quarter combat, numbers and sheer luck based. So even characters that are more heavy support and offense based are all-rounders compare to the equivalent of ther armies, as shown before with the dreadnought/deff dread example.