Well,
@sneakypete ... The two you are looking at are kinda crap.
The i3 would kinda be a battery sipper if you are wanting something with longer battery life, but will suffer performance-wise when compared to i5 or i7.
but neither one has satisfactory RAM, and the sad thing about ACER is that their economy models are often incapable (artificially limited) from increasing RAM. Note that I don't know if that is still true - I haven't looked at an ACER in years. But I surely would be very careful about that aspect.
4g RAM is nowhere near enough.I would say Windows cannot run properly without 8g, and I REALLY like 16g. So right off the drop, figure on upgrading the RAM immediately.
@corbe is sending you the right way. With the money you have to spend, I would be looking for a used, off-lease, business class machine. At least 8g RAM and at least a newer generation i5 (or i7) processor.