Looking at the profiles tab in Coriolis the pitch rate increases by around 25% (D to A grade thrusters is around 9%) so it's going to be noticeable along with a speed increase of over 30%, the TTD (time to drain) in Coriolis refers to how the weapons can fire before draining the weapon capacitor in the power distributor (@ 4 pips), 35 seconds is a decent amount of time and it'll be even longer if you use the beams to kill the shield and the MC's for the hull.
Weapons are really down to what you like using, I use class 1 pulse turrets and gimbaled class 2 pulse in the medium hard points, the turrets help with the Vipers lowish pitch rate as even engineered it's not going to be up to Vulture levels of agility, add some armour, HRP's and MRP's and it'll be a real tough ship.