Have you been for a consultation? It unfortunately isn't as easy as just picking the one you like the look of, there are much more complex things for an audiologist to weigh up when recommending the correct hearing aid for you.
The size and shape of your ear canal (if you have narrow or small ears, with the best will in the world you probably won't be able to have a completely invisible hearing aid inside your ear no matter what price you pay). Also if you produce a lot of wax or have ears prone to infection.
The type of hearing loss you have - sloping high frequency losses in particular are hard to fit in the ear aids to, as the blockage of the ear canal causes occlusion.
Also depends what features you want. If you want to hear well in noisy environments you would benefit from directional microphones, which generally aren't found in ITE aids. App control of the sound and Bluetooth often not available in the smallest aids either.
Consultations are free at Specsavers/Boots etc, why not book yourself in and see what is recommended? Ultimately, there is absolutely no point in having a hearing aid that doesn't improve your hearing...sometimes if you choose the wrong style that can be the result, so please try to go in with an open mind to changing if you try it and don't like it.