As far as suspension goes I can only speak from my experiences for both the transformation of the bike afterwards and the customer service (initially and later for service work) I received from both companies I chose to use:
Maxton GP20 Fork conversion
Nitron NTR R1 rear shock
Then probably one of the best real world tuning exercises ever done to a 2v motor:
http://www.sigmaperformance.com/torquemonster.html