I'd really suggest a decent set of resistance bands, all you need is space and a door and you can do pretty much any free weight exercise plus those of a cable pull machine. all for a cost a fraction of a set of decent free weights.
A decent set of bands is a reasonable price for example http://uk.bodylastics.com/strong-man-xt-set/ which is a decent brand for good quality bands.
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A modicum of grunting is fine....but urrrgh, urrrrGh, urRRGGHH, URRRGHGH,UURRRGGGGGHHHHHHHHHHH!!!!!! from the first rep is totally unnecessary and quite frankly just a little but weird and disconcerting...if for no other reason that instead of sounding macho, it just sounds like an overly excited badger has stumbled into the free weight section...