If irritation is your concern, then my general suggestion is to try a sharper blade. Note that I did not say to try a more aggressive razor. If you suffer from irritation, then it's because either (a) you're going over the same spot too many times or (b) you're using too much pressure or (c) your lather isn't very protective or (d) you're just still new at this and your skin hasn't toughened up yet. The solution to (d) cannot be shortcut: it simply requires time. That leaves (a) and (b) and (c).
If (a), then the reason could either be that you haven't nailed down the right shaving angle, or that either the razor or blade isn't doing a good enough job cutting the first time. A more aggressive razor might fix the second possibility, but it cannot fix the first possibility.
If (b), then the reason could either be that you just haven't developed the muscle memory to maintain a constantly light pressure, or else you haven't nailed down the right shaving angle, or else the razor or blade isn't doing a good enough job cutting the first time. A more aggressive razor might fix the third possibility, but it cannot fix either of the first two possibilities.
If (c), then no change to razor/blade setup will do anything to fix the real issue. In fact, it might make the irritation worse, or increase the risk of nicks without reducing the risk of razor burn.
In my opinion, the solution is to use the same razor, same soap, same brush—and just try a sharper blade.
If (a), then the reason could either be that you haven't nailed down the right shaving angle, or that either the razor or blade isn't doing a good enough job cutting the first time. A more aggressive razor might fix the second possibility, but it cannot fix the first possibility.
If (b), then the reason could either be that you just haven't developed the muscle memory to maintain a constantly light pressure, or else you haven't nailed down the right shaving angle, or else the razor or blade isn't doing a good enough job cutting the first time. A more aggressive razor might fix the third possibility, but it cannot fix either of the first two possibilities.
If (c), then no change to razor/blade setup will do anything to fix the real issue. In fact, it might make the irritation worse, or increase the risk of nicks without reducing the risk of razor burn.
In my opinion, the solution is to use the same razor, same soap, same brush—and just try a sharper blade.