It's better to have conditioning than be bulked up.
I've lifted since I was a teenager. It is much harder to gain and HOLD ON to muscle than it is to stay in decent cardio shape. Also sucking wind after a few hard sprints is much harder than any lactic acid burn.
Being in good cario shape is way more practical. Most lifters don't get to use their strength/muscles at all outside helping a buddy move their apartment once a year. The only people that dig the huge muscle look, are other men and disgusting women.
I always think of it in the worst case scenario of like 1 in 1,000,000 chance happening. If for whatever reason I got stranded in the middle of nowhere what's going to come into play more...the fact you have a 2,000 total in bench/squat/dead or the fact you can run a sub 6 minute mile? ...obviously the cardio aspect.