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The 456 might feel a bit slack & heavy after the dale. The Soul is a lovely frame, but quite expensive.
It's worth having a look at these two as well:
Pipedream Sirius & Scion or Dialled Bikes Prince Albert
Both more nimble in terms of their geometry and with nicer tubing than the 456 and cheaper than the Soul.
Not to be a chuffnubbin or anything, but the Dialled PA is 'Reynolds 725' steel.
The On One 456 is 'DN6' Steel (named after On-One's postcode)No matter what the name is, both of these are exactly the same, 4130 (this is the industry standard AISI designation) double butted steel.
http://www.finishing.com/323/64.shtml
http://www.on-one.co.uk/i/q/FROO456E2/on-one-456-evo2-frame
http://reynoldstechnology.biz/assets/pdf/rtl_steel_alloys_extract.pdf
Interestingly (ok, not very) scroll down to the bottom of the Reynolds info and they have a stiffness chart, all of the steels are shown to be stiffer than the 6061 (ok, so there's 7005 as well but I didn't notice any info on that) which is the regular Alu used in bike frames. And Aluminium frames get slated for being 'stiff' and steel is supposed to be 'compliant'.
It's all a load of old trousers, but @Chak I found my On-One seemed to feel larger than it's 16" frame size should have.
Good Luck
Alkali-
Whoops, I appear to be stuck in a timewarp and hadn't noticed that there wasn't an 853 version of the Prince Albert anymore :-/
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Interestingly (ok, not very) scroll down to the bottom of the Reynolds info and they have a stiffness chart, all of the steels are shown to be stiffer than the 6061 (ok, so there's 7005 as well but I didn't notice any info on that) which is the regular Alu used in bike frames. And Aluminium frames get slated for being 'stiff' and steel is supposed to be 'compliant'.
All steels have essentially the same stiffness, all aluminium alloys have essentially the same stiffness too, which is around a third of that of steel. The difference isn't the material, but the disposition of it. To make a steel frame strong enough, you can use skinny tubes. To make an aluminium frame strong enough, you need about 3 times as much volume of metal, so you dispose it in large diameter tubes; the problem with all tubes is buckling, and that's a function of the ratio of diameter to wall thickness. To optimise your structure, you go close to the buckling limit as that places the material as far as possible from the axis. The stiffness of a tube is proportional to the fourth power of its diameter. When you shake all the maths out of that, it turns out that if you use the smallest amount of material needed to hit your strength target, a structure made from aluminium turns out stiffer than one made of steel, even though the material itself is much less stiff.
BareNecessities
gbj_tester
The 456 might feel a bit slack & heavy after the dale. The Soul is a lovely frame, but quite expensive.
It's worth having a look at these two as well:
Pipedream Sirius & Scion or Dialled Bikes Prince Albert
Both more nimble in terms of their geometry and with nicer tubing than the 456 and cheaper than the Soul.