I had a full RST set trews & Jacket that I was more than happy with...The paramedics decided to cut it off me tho which kinda ruined it.
After that I had a couple of jackets that I picked up 2nd hand.
Now I have ISX trews & jacket, from J&S. Both fully armoured. The back protector was IMO a bit flimsey so I changed it for another one I had. The only gripe I have with it is the neck closure velcro is a bit weak.
Top Tip when trying it on. Firstly go at least a size up to what you normally would get so it gives room for extra layers. Secondly When you try it on take anything else you nomaly have on with you. balaclava, neck warmer that sort of thing. Thirdly dont forget the position you are in when riding is much different that standing up admiring yourself in the shop mirror ! If poss ask if you can try sitting on your bike in the new kit to see if it rides up.
Try to get matching trews & jacket as they should zip together...stops the drafts up your back.
Size wise they all tend to be different so you do need to try before you buy.
Watch the leg lenghth if the inside leg is too long the knee armour wont sit over your nees correctly.
Last thing I have to add is all the textiles I had over the years have all leaked. They tend to be shower proof but not rain proof. I've even got propper soaked just from spray off the road, even tho it wasnt raining. These days I use an Oxford over suit which does keep the rain out & also helps keep you warm.
Now gloves...Invest in a set of heated gloves...best investment ever for winter riding. Forget heated grips they will only warm your palms.
Dont forget the jacket cuffs have to go over your gloves or else the rain will run down your sleeves & fill your gloves up. The jacket glove combo I currently run wont allow this but the Oxford rain suit does go over me gloves.
https://www.jsaccessories.co.uk/buy/IXS ... /19237.htm
Not sure this is the exact one I have but close.
https://www.jsaccessories.co.uk/buy/Oxf ... /23347.htm
This is the one I have & I highly recommend it. Again try on over the jacket you buy as you need a bit of wiggle room. The trews that go with it are a bit flimsy but work ok, just make sure what ever ones you get have either a zip or very wide bottoms. You need to be able to get them on over your boots. Last thing you want is to have to take your boots off at the side of the road in the pooring rain...
Talking of boots...
https://www.jsaccessories.co.uk/buy/RST ... /18227.htm been using these two winters now no issues, keep your feet nice & dry. Again go a size or two up to allow thicker socks...

Making up since 2007, sometimes it's true...Honest...