skimping on tailoring is a big no no in my books.
i've just spent $80 getting the sleeves lengthened and having the sides taken in slightly on a navy sportscoat. money well spent, irrespective of the price of the jacket. if it improves the fit, it's priceless. you gotta pay to play. there's a book you should read that will hopefully inspire you - Glenn O'Brien's How To Be A Man.
I can see how I come off as being too cheap on tailoring, but simply most jackets can't be tailored for me on account of my body shape (not enough material etc.)