ec300 or ec450

[fkmf6]

help me decide please. am looking at buying 2010 gasgas ec300 or ec450 and cant decide. i have been riding 2strokes for 30years but recently rode my mates 06 450fsr and was an absolute weapon however in saying that my mates ktm300 is pretty quick and nimble in comparison. i do have a soft spot for 2strokes but seems to me that everyones going 4strokes for reliability. i am a weekend warrior so to speak but not racing. any feedback would greatly be appreciated from anyone that has ridden both bikes. please no 2stroke or 4 stroke haters just need good and honest opinions on either bike as this is a decission i have to live with for a while thanks
jim from australia