Scale and Basing - 15mm vs 10mm

[Ethelred the Almost Ready]

Hi, I am new to this forum and have so far only played a couple of games of MEG with my 28mm figures.   I want to use the rules for large scale battles and to have the look of massed armies.
I am tossing up between 10mm and 15mm figures.  The aim to to do a fairly quick paint - again, going for a massed look rather than individually pretty figures. 
I am playing solo mainly and if playing against others I will be proving both armies.
10mm will allow up to 10 figures on a 40x20 base (two ranks of 5). 
I am unsure whether only four 15mm figures on a base will give me the mass I want.  Can a second rank of figures fit on a 40x20 base?
I suspect they won't, my Napoleonic miniatures are 18mm (Eureka) and need 25mm for two ranks.
If I did go with deeper bases (25mm) would this affect the mechanics of the game much?

So far I love the rules and look forward to contributing here in the future.

[nikgaukroger]

Deeper bases would have little effect - just take up a bit more space.

[Lanceflint]

A base depth of 30mm, for infantry, would have very little effect on game play and allow for the massed effect that you desire, in either scale.
Lance.

[Ethelred the Almost Ready]

Thanks for that.  Decisions, decisions...............

[badhabum]

The short answer is : If you keep tha 15 mm basing, you will be able to play with any other MEG player without any problems . Now 10mm or 15 mm is really up to you 

Some players use their 10mm vs 15mm armies, dwarves vs big humans .

So what is the visual effect you prefer ..;choices