Mountain bike advice (£800)

[Born_2_Kill_83]

As a teenger I'd be out on my bike 11 hours a day, I had a Tim Gloud Peugeot and thought the world of it, spent all my pennies on it. Fast forward 20+ years, I've recently lost 8 stone and got fit again I'm finding myself wanting to get back into it again.

I'll be needing a medium size frame and I'm open to options on 27.5/29", I have a £800 budget.

I'd nearly settled on the Gaint Talon 2 27.5" (£600), but there's no stock of the 2020 version in the UK and would mean waiting till Sept for the 2021 stuff.

Now I'm wanting a Trek X Cal 7 in gold 29", 2021 version comes in stock in 2 weeks.

Is there anything else I need to know, anything I'm missing, any better bikes? Been away from the scene for a long time, help much appreciated.

 

[Born_2_Kill_83]

I'm 5'9 without shoes I was told medium, as for 29" after lots of time on Google it's only not advised to go this way if your short, other than that if preference between high speed (29") and acceleration and tight cornering (27.5 "), smaller sized bikes only come in 27.5" anyway