True. But that could be said for most foreign players accross europe.
Thats why English or rather premiership based player have such a premium.
They are unknown unless you watch them, unknown to you doesn't mean unknown to others. 15mil for two players who no other top clubs are remotely interested in? A 17year old playing in Norway that not everyone has heard of who happens to be brilliant and you get as a bargain, sure, a 20+ year old who has played for the national side, played for years, and been scouted by many thousands of scouts and hundreds of clubs across Europe and there is little to no interest?
Two players for 15mil isn't a bargain unless those two players are good. M'villa, well is being touted as a problematic player because of some completely nonsense, went out before a French game(friendly maybe?) when the whole team did, refused to shake Blancs hand so he's a terrible influence, press makes mountains out of molehills, whenever they choose to. However when I've seen him play I've seen nothing impressive at all, Remy, is angling for a move and the club haven't relied on him as such... I don't care if players want to move but when a club feels they can bench a player it only suggests to me they aren't as good as everyone likes to make out. Likewise he's scored an ok amount but 10-15 goals in 30-40 games isn't that impressive, he also shoots quite a lot and hasn't put in a season with a particularly great shots/goals ratio.
Again I've not really seen anything to suggest that M'villa/Remy will be anything special, and 80k a week for either would simply be the same problem Arsenal have had for years, overpaying average players for no reason and screwing ourselves financially.
As for adding where we are weakest, that is the most ridiculous statement of all, Arsenal has, central midfielders, and central strikers, and thats it. We have one potentially good fullback who doesn't get played and 3 woeful ones, we have zero natural wingers at the club, we have a bunch of central strikers and central midfield players we play out wide, central midfield we aren't lacking in even remotely and upfront we aren't lacking remotely.
Wilshire and Arteta are both excellent defensively and by excellent I mean, amongst the best in the league with Wilshire being probably the best. Podolski has proven many times in his career that he's a top striker, there is a class that you see when he is in the box and finishing, but we play him out wide in the wrong system with the wrong player upfront most of the season.
These two would add the least possible to the squad, neither would be starters, both are being offered 80k a week to start at QPR(I'm guessing for M'villa but its likely similar to Remy), neither are cheap, both are incredibly expensive on wages, and 15mil is in no way "cheap" for back up players who won't play. Wenger rarely rotates except after injury, like Chamakh, and thus neither would likely pay. 15mil + 8mil a season for 4 years is 47million for 2 players who won't be first team, that we can't use on buying actual top players who will play every game... cheap..... no.
Arsenal have a 143mil(last season) wage bill full of "cheap" players... loads of cheap players who aren't good enough means you can't afford top players who are good enough, it is the fundamental reason Arsenal can't pay guys like RVP 150k a week or pay 30mil transfer fee's, cheap... not even close.