I've been having the same conversation with myself for a few weeks now. Today I went to see a Z4MR and a 3.4s boxster.
This one won out in the end
http://www.autotrader.co.uk/classified/advert/201310099192612/sort/default/usedcars/make/porsche/price-to/15000/postcode/dl11eq/price-from/14000/radius/1500/engine-size-cars/3l_to_3-9l/model/boxster/page/1/onesearchad/used%2Cnearlynew%2Cnew?logcode=p
