A new month is here, so what better time to make some new additions to your investment portfolio.

But which ASX shares would be top picks for a $10,000 investment? Let's take a look at a couple of shares that analysts at Morgans rate highly. They are as follows:

Lovisa Holdings Ltd (ASX: LOV)

This first ASX share to look at for a $10,000 investment is Lovisa. It is a fashion jewellery retailer with a rapidly growing global store network.

In fact, Morgans thinks that the company could soon hit 1,000 stores globally. But if you thought that was where it stopped, think again. The broker explains:

The pace of store rollout has started to accelerate after a period of consolidation, notably in the US over the past two years. We believe Lovisa is poised to hit the landmark of 1,000 stores before the end of the current half, possibly by the time the outgoing CEO Victor Herrero hands over the reins on 31 May.

This underscores what we see as the most important element of the Lovisa investment case: the business has a subscale presence in almost every one of the 50 markets in which it operates and significant long-term growth potential in each. We believe the platform for long-term growth is getting stronger all the time.

Morgans has an add rating and $36.00 price target on the company's shares.

Nextdc Ltd (ASX: NXT)

This data centre operator could be an ASX share to buy in March according to analysts at Morgans.

The broker is very positive on the company's outlook and highlights that it is building a solid foundation to create value. In light of this, the broker thinks it is worth being patient with this one. It said:

NXT's 1H25 result and outlook were largely as expected. The key challenge for investors remains the tradeoff between NXT investing now to setup the business for a much greater size (higher OPEX now) and the fact that they are investing ahead of revenue growth (higher OPEX is a short-term EBITDA drag).

NXT needs to execute well now, on commitments already made, to remain a preferred digital supplier, and continue benefiting from the decades of digital infrastructure growth which is yet to come. Incidentally, a ~$200m+ increase in revenue is already contracted so this is just a timing challenge. We see building a solid foundation as the best way to create value, but acknowledge it can create a jittery investor base, in the short term.

Morgans has an add rating and $18.80 price target on its shares.