I'd pick 'Balance both equally' - but how do you plan to define 'flawless' and 'strong' in the context of MVP, and what are your priorities for the user base?
In our startup, we focused on building a flawless MVP and ended up with a product that was over-engineered; I'd caution against 'Wait for perfect product'
I'd pick 'Balance both equally' - but what does 'strong MVP' mean to you, is it about having a solid tech foundation or a product that already delivers significant value?