Does £600 include/exclude a monitor?
What games do you play &/or intend playing?
What screen resolution do you game at? Or, what is the make & model of your monitor?
"Am I right in thinking that an extreme gamer option is overkill for my current gaming usage?" - most probably yes, but would largely depend on the above 2 criteria
"Do you think I would be able to make do with a general computer?" - yes again, & adding a dedicated graphics card (& possibly a suitable PSU for the latter)
"I was looking at the dell site, and they state cards as integrated or by name. Does this mean that named cards are dedicated?" - yes. However, these days Dell's aren't the best value for money/performance, but we'll have a look at a few for comparison
"Apologies for the essay!" - that's nothing compared to what we have to put up with sometimes ;-). Don't get me started either!
Btw, the amount of graphics memory these days is not very important as most (if not all) 'gaming' standard graphics cards have a minimum of 512Mb memory anyway. The GPU chip/model is the most important, followed by its type - GDDR3, GDDR5. 'Dedicated' graphics basically means a *separate* graphics card - as against 'integrated', which is part of the motherboard. G