Soldato
Out of those two options I'd sooner go for 1 over 2. The Vali imo is nothing special (I still own one...). It got a lot of hype on Head-Fi (thanks to a certain Schiit shilling individual) but I don't really think it's deserved. It's a fairly neutral sounding hybrid design, and doesn't really exhibit much of the 'typical tube sound'. Which then begs the question, if you want a cheap neutral sounding amp, why not get the Magni or an O2 variant instead?
The Asgard 2 is a nice bit of kit. More than enough power for most headphones and it's got a nice warmth to it that the Magni and O2 lack.
If you want another option, take a look at the Matrix Mini-i (not the Pro which is a bit more expensive). It is a very solid product for the money. A very good DAC section and the built in amp is decent as well.