Bilstein B10's or GAZ

[Slik Gambino]

I know there are lots of threads on here with contradicting views.
But i have a gsi nova that at present is std although i am putting a red top in when i get the time. does anyone know the pros and cons of these 2 suspension set ups, i will be driving for 6months at least befor i change the engine. i run cav slabs and the bilsteins drop 55mm front 40mm rear will this be ok? If i had Gaz would i have to modify anything and how do they ride for A + B roads driven fast.
It would be intresting to here peoples input as i only want to buy it once and cant afford expensive mistakes.
Regards Slik

[Pistol Pete]

Have a search on here for coilover info. Bilsteins, shock and spring setup i take it? Coilovers will be fairly firm. Will need extra poundage springs for the XE engine (extra front end weight) obviously.

[craig green]

Are Billy B12's the fat piston ones? So B10 are the regular 'yellows'?? Personally I'd go with coilovers as they give the best scope for future usage & if the car evolves beyond what you have planned now.

I appreciate the attitude towards expensive mistakes & buying once. Crappy suspension is where I have had the most issues. I have wasted hundreds on rubbish kit. Bought some GAZ coilovers back in jan & am happy though.

[Slik Gambino]

http://www.europerformance.co.uk/pages/products/product_info.mhtml?product=3831122
B12's are yellow in the picture are slightly dearer than the B10 power kit and lower the car 30mm but they dont give poundage.
http://www.europerformance.co.uk/pages/products/product_info.mhtml?product=3911271
these B10;s are blue and give poundage and lower the car 55 front 40mm rear so they are lower. i run slabs and the front sits very high at present is 55mm about right?
What are the Gaz like on country roads and fast sweeping B roads which is what i will be mainly driving on, are they adjustable and how much do they cost for a set. if i buy poundage for when i put the extra weight in will it effect it adversly by not having the weight if it takes me a while to put the engine in and i end up keeping the small block?