Mobile Athlon 64 vs Turion ML

Hello,
I would like to upgrade my older notebook (MSI M655x / MSI 1039 whitebook) to absolute possible maximum.

Notebook is socket 754 based (running Turion MT-37).

I am struggling between Mobile Athlon 4000+ ( Newark, rev. E5, Vcore 1.35 V, 2.6GHz, 62W TDP) and Turion ML-44 or ML-42 ( Lancaster, rev. E5, Vcore 1.35 V, 2.4GHz, 35W TDP)

My opinion:
Claimed TDP of 62W for Mobile Athlon series based on 90nm process (rev. E5, Newark) is extremely excessive. With the same CPU structure (and same revision of it) and same Vcore I can't believe that one CPU is supposed to consume almost twice the power (I know that TDP does not mean power consumption, but different tdp within same product line should mean difference in power consumption).

For example mobile semprons (s754 based, 62W TDP, Vcore 1.4 V) can be found in HP nx6125 notebook (I owned one) and i can guarantee you, that this CPU doesn't consume more than 30W even under biggest load (+ notebook is supplied with 60W DC adapter)

power consumption increases linear with CPU frequency and exponential with core voltage. Mobile athlons (62W) and Turion MLs(35W) have same vcore

Haven't anyone tried to compare real power consumption of Mobile athlons (90nm, E5) with Turion MLs ? I suspect, that power consumption on the same frequency will be almost on par (if not completely).

Is there anyone that can confirm Mobile Athlons working in this notebook ?

And most important question: Any idea where to get this CPUs besides ebay ?