Best Dyson under £300 ???

[Poita]

I have a fairly large two bedroom apartment that is only carpeted so no hard floor area.
My Dyson V6 doesn't cut it and I'm sick of the battery running out halfway through vacuuming the place. So I want to get another Dyson under £300 and my priority is maximum dust extraction as I'm a bit sensitive to dust. Also, I don't want super fine particles being blown back out. So, I want to get a model that has a cord for unlimited cleaning time or a long-life battery and with super strong suction power and fine particle dust retention.
Convenience isn't a priority to me, so I don't mind between cordless or upright.

My sub-£300 Dyson options are:

Upright/plug in

- Small Ball Allergy (£199)

- Small ball Animal 2 (249)

- Ball Animal 2 (£299) *sold out*


Cordless

- V8 (£299)

- Micro 1.5g (£299)

- V7 (£299)


Ball Animal 2 seems to be perpetually sold out.
So, baring that one, what is the best option from the list according to my above criteria?

 

[jj4091]

Small ball animal certainly has plenty of suction, lifts the carpets even on the lowest setting, it is also much more manoeuvrable around furniture than our other older one with a wider head. I would imagine the allergy one would have better filtration from that description but no experience of it. Can't comment on other models.

 

[Old Salt]

Get a henry with a hepa filter much better than falling for Dyson’s hype.

 

[foxhole]

Get a henry with a hepa filter much better than falling for Dyson’s hype.

My local tip has a porta-cabin full of broken dyson vacuums.

 

[flameport]

So I want to get another Dyson

Much better manufacturers are available.
https://sebo.co.uk/domestic-vacuum-cleaners.html?cat=13