Forks Upgrade?

Veddy

I have a Saracen Mantra 2016 and so far I'm loving it. At the moment it has Suntour XCM forks with HLO. I was thinking to upgrade my forks to these Rockshox 30 Silver TK Coil with disc mount and crown lockout (650b).
http://www.chainreactioncycles.com/rockshox-30-silver-tk-coil-forks-9mmqr-2017/rp-prod151086
I have to 3 questions. I
Is it worth it for 123 quid?
These forks are 100mm travel and my bike forks currently are 120mm. Will the bike be alright if I change them and what effect will it make?
If this isn't worth it, are there other forks for around 150 which are better?
Thanks

cooldad

I wouldn't go shorter than the 120mm already on.

supersonic

It's a modest upgrade - a little lighter, smoother and better made, but are pretty hyperactive (bob a lot). £123 is ok, but I'd look for a Suntour Epicon.

Veddy

Thanks for the help guys

Veddy

Having trouble finding an epicon for less than 200. Any other suggestions?

jamski

Not sure about for a 650b, but I was looking the other day and found a Recon Air for about £150, but that was for a 26er. Might be worth looking at?

poah

problem is looking for a fork thats tapered and QR at a price you can afford. I would save more

The Rookie

or get plain steerer and an adaptor.

jamski

Looking on crc, I think you'll have a lot more choice around the £200 mark.

rockmonkeysc

Go for a plain steerer. With a QR axle tapered steerers make bugger all difference.