several freinds of mine own 420s.There great!
i own a trx 300,i think its much better because it is much more manouverable and does what i need it to.Ive got no idea how fast it goes though(as the dial only goes as far as 30kmh,and the needel carrys on)
We have spread fertilizer with it,chain harowed 20/30 acers in the last year,the last owner went spraying with it,you can pull a topper with it.
It also doesnt cost much to run.
A weekend wasted is not a wasted weekend.
FLAT OUT FARMING!!