You do not need to compress any springs when using quick struts. In fact, that's the whole purpose of quick struts!
Monroe and Gabriel are having rebates until the end of the month when you buy four shocks and/or struts.
KYB is better, if they make quick struts for your van, but they do cost more and there is no rebate.
Also, DO NOT buy cheap non-name quick struts like FCS, Leacree, Dura Intl, Unity, etc. They are junk and don't last more than 10k and might not even outlast the transmission.
Also, avoid Monroe's "Econo-Matic" quick strut. They're only slightly better than the Chinese junk listed above. The economy struts are colored blue and contain the Monro-Matic strut which is garbage.
ONLY use Monroe's premium quick strut, Gabriel, or KYB. Raybestos and Moog are also OK since they are just rebranded Monroe quick struts.
Napa's house brand is Monroe. Napa Response is the economy strut you want to avoid. The good one is just called Napa quick strut.
Also, since you'll need new sway bar links, get Deeza brand. They are great.