SP 404sx or SP 555?

[enveloping_darkness]

I am about to buy a new sampler, and after months of research, I've narrowed it down to 404sx and 555.

I am a techno/ebm DJ and I would like to add something new to my setup (3-channel mixer and CDJs) in order to trigger short samples, long samples (4-7 mins ambiences and vocals), and drum patterns during my DJ sets.

I would like to know:
- if anyone of you has ever tried something similar
- if the tap tempo is enough to sync the unit MANUALLY to my CDJs
- which of the units best fits my needs

Thank You in advance!

PS: in my country (Italy) 555 is around 300€ and 404sx around 350€

[Crippnipp]

if you can find a 555 cheaper than a 404sx buy it