Rain gear that "breathes" such as GoreTex or similar for me is much better than the rubber/vinyl type suits. Never owned FroggToggs, never cared for them. We have used GoreTex PacLite for several years & it works reasonably well. Light enough for warmer season rains so that the inside is not as wet with sweat as the outside, & in colder rain works well as an outer layer.
Would get heat shield type rain pants since when you stop on a wet road you don't want a melted pant leg sticking to your pipes.
No rain gear is "perfect". When I began riding a very long time back, a trash bag with armholes was my gear of choice. So for me anything from there was an improvement.
Unless am riding for quite a while into rain, I rarely stop to gear up anymore unless the cold temp requires it. A good leather jacket & my leather legs have taken me up & down many, many miles of rainy wet roads relatively dry. Dependant upon the amount of rain & the temp my leather works very well. But if it's cooler & not just a lighter shower - we usually gear up. If am 15-30 minutes from my last stop of the day or from home I just ride through it.
Get waterproof boots. Gaitors over boots are a PITA. Buy a suit size large enough to allow a layer over so it can be worn as outer gear for those really cold wet days. Good seam seals & good flaps over zippers are your friends on rainy days.