I've been fooling around with "tape" and Nebula for a while now and while there are definitely some nice colors, I don't find it "punches" as much as Tone Booster TapeBus - which seems to make it to my master bus the most now.
I like the NAG tape from Eric (bigger sound), V-tape prest from Yuval and Strudel preset from Acustica (nice colors). Even though I really want to like CDS libraries, I just can't like it enough to justify the price tag.
I say just stick with the free stuff (Yuval, Nebula) and then maybe pick up another library you like (HenryO, AlexB, Eric) and then highly consider Toneboosters TapeBus.
If You need serious punch I'd suggest AlexB Anamod (especially the 15ips sat2 preset).. most punchy tape lib I've come across, then maybe Nag 15ips, also to add punch I'd recommend buying CdSoundmaster TapeBooster.. it's adding a lot of that grit and punch.. especially when using more then one instance (after or without regular tape preset - your choice)..